Preheat the oven. Set to 400°F (200°C).
Lightly grease a muffin tin or line a sheet pan with parchment.
Make the glaze. Stir together ketchup, honey, vinegar, soy sauce, and chili flakes in a small bowl. Set aside.
Prep the aromatics. Grate the carrots and ginger, and finely mince the onion and garlic. The finer the cut, the more evenly they cook and blend.
Mix the base. In a large bowl, combine ground meat, grated carrots, ginger, onion, garlic, breadcrumbs, egg, milk, soy sauce, ketchup, salt, pepper, and coriander.
Add herbs if using.
Don’t overmix. Use a fork or your hands to mix just until combined. Overmixing makes the minis dense.
Portion the minis. Divide the mixture evenly among 10–12 muffin cups, or shape into 10–12 small ovals on a sheet pan. Press lightly to compact.
Glaze the tops. Spoon or brush a little glaze over each mini.
Reserve some to add near the end.
Bake. Place on the middle rack and bake for 15 minutes. Rotate the pan and brush with more glaze.
Finish baking. Bake another 7–10 minutes, until the centers read 165°F (74°C) for poultry or 160°F (71°C) for beef/pork, and the tops are shiny and caramelized.
Rest and serve. Let them rest 5 minutes before removing from the pan. Serve with extra glaze if you have it.